But... If you change on customise you lose the option to mark your and OPs posts in different colours, if you tick 'don't watch' on the thread then I think you keep the custom colours. I've had an insomniac night and been looking at this!

I'm on the main thread in Site Stuff, tis stickied & it appears that there is no way of getting your colours back at the moment. Lots of posters unhappy. MNHQ said that they have a clear out of customise options & it looks as though the colours have gone